Advisory Details

October 31st, 2007

Novell Client Trust Heap Overflow Vulnerability

ZDI-07-064
ZDI-CAN-199

CVE ID CVE-2007-5767
CVSS SCORE
AFFECTED VENDORS Novell
AFFECTED PRODUCTS Border Manager
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 5486. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Novell software which utilize the Novell Client Trust. Authentication is not required to exploit this vulnerability.

The specific flaw exists in the Novell Client Trust application, clntrust.exe, which listens by default on UDP port 3024 on Novell client machines. During a validation request, the Client Trust process copies a user-supplied Novell tree name until a wide-character backslash or a NULL is encountered. If neither is found within the data, the process will copy excess data which later overflows a static buffer during a call to wsprintfA.

ADDITIONAL DETAILS Novell has issued an update to correct this vulnerability. More details can be found at:
http://download.novell.com/Download?buildid=AuOWp2Xsvmc~
DISCLOSURE TIMELINE
  • 2007-07-17 - Vulnerability reported to vendor
  • 2007-10-31 - Coordinated public release of advisory
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